Vat dye.



s'rerns Parana ora ion.

ARTHUR Ltt'r'rIuNcHAUs, or LUDWIGSHAFEN-ON-THELRHINE,GERMANY, ASSIGNOR T0 BADISCHE ANlLIN & sons. FAJBBIK, or LU'DWIGSHAFEN-ON-THE-RHINE, Guns ;MA1\TY, A. CORPORATION.

1,o11,oes.

No Drawing.

- Specification of Letters Patent.

Application filed February 18, 1911. Serial meoasiiff 1 useful Improvements in Vat Dye, of which the following is a specification.

I have discovered a new vat coloring matter of the anthracene series which can be obtained by condensing l-halogen-anthraquinone-Q-carboxylic acid with beta-naphthylamin and then subjecting the product so obtained to a furthercondensing action, so

that the elements of water are removed and ring formation takes place. The condensaand three-tenths parts of calcined sodium carbonate in five hundred parts of hot water.

'Add thirty-three parts. of beta-naphthylamin, two parts of copper powder and one vNow what I claim is The new coloring matter of the anthracene series which is obtainable from I-halogen-anthraquinone 2 carboxylic acid and beta-naphthylamin, which is an anthraquinone-naphthacridone and possesses a constitution corresponding to the formula 00 ignand consists, when dry, of a red powder,

hundred and thirty-five parts a calcined sodium carbonate. Boil .the mixture for from threev to four hours, and then, when cold, filter to'remove the'sodium salt of betanaphthalido anthraquinone 2 carboxylic acid; wash this with water and then extract it I with boiling dilute hydrochloric acid. Then treat ten parts of the carboxylic acid so obtained with one hundred parts of orthodichlor-benzene and'seventy-five parts of phosphorous pentachlorid for from one to two hours, at ordinary temperature. Then filter off the coloring matter and wash it with alcohol or acetone.v

My new coloring matter is free from chlorin' and consists, when dry, of a red powder. ltiis difiicultlysoluble in boiling anilin with a-brownish red color, it yields a reddish yellow solution in seventy per cent. sulfuric acid, from which solution after a short time an orange precipitate separates out;'it is. insoluble in sixty-five per cent. sulfuric acid, and dyes cotton from the vat beautiful red shades.

The formation of my new coloring matter can be represented by the following formulae which is dificultly soluble in boiling anilin with a brownish red color, which yields a vat beautiful red shades.

In testimony whereof I have hereunto set my hand the pr'esence of two-subscribing wltnesses;

ARTHUR LI JTTRINGHAUS.

Witnesses: I l

J. ALEO. LLOYD, A. O. TITTMANN.

Patented Dec. 5, ion. 

